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In the Forum: Horn-Loaded Speakers
In the Thread: Vitavox S2 with Electromagnets
Post Subject: Re: field strength a red herringPosted by guy sergeant on: 1/12/2006
In the case of the Audio Note field coil cartridge the field strength (and hence output) was significantly less than that from the permanent (AlNiCo) magnet equipped Io. Yet the performance of the field coil version (Io Ltd) was 100x better despite all of the other parts being identical. It isn't about field strength per se but seems to be about how the field behaves and replenishes itself once bent out of shape.
(If anyone has one of these cartridges lying about unloved & unwanted please let me know. Horrible brown thing with 6 pins on the back.)
It may also be worth looking at whether you need a constant voltage or constant current power supply.
For those less sure about the content of this thread, some explanation of the theory is at herehttp://home5.inet.tele.dk/f-hammer/
I'll certainly be interested to hear how the field coil S2 can be made to sound.
best regards
GuyRerurn to Romy the Cat's Site